just better.® Recipe of the Week: Rainbow Soba Stir-Fry + Spicy Peanut Sauce

What’s Inside:

This colorful soba stir-fry recipe is all about variety—on your plate and in your gut. Packed with rainbow veggies, edamame, and a flavorful peanut sauce made with just better.® prebiotic fiber, it’s a simple, plant-forward meal that supports microbial diversity and makes healthy eating feel exciting again. 

just better.® Recipe of the Week:
Rainbow Soba Stir-Fry with Spicy Peanut Sauce

Eating a variety of plants is one of the best ways to support a diverse, balanced gut—and this colorful soba noodle stir-fry brings that concept to life.

Inspired by our latest blog post on gut bio-diversity, this dish features a rainbow of fiber-rich veggies, satisfying soba noodles, and a bold, flavorful sauce that brings it all together. It’s a weeknight-friendly recipe that checks all the boxes: plant-forward, fiber-fueled, and microbiome-approved.

We’re bringing the color, the crunch, and of course—a serving of just better.® prebiotic fiber to help nourish those beneficial gut bacteria. Bonus: it’s totally customizable. Swap in any veggies you have on hand, and use tofu, shrimp, or no protein at all, depending on your vibe.

🌿 Ingredient Highlight

Soba Noodles: Soba noodles are traditionally made from buckwheat flour, a naturally gluten-free pseudograin that’s rich in plant compounds and easier to digest than many whole grains. While some store-bought soba noodles may contain a blend of wheat and buckwheat, 100% buckwheat soba is widely available—just check the label if gluten is a concern. Buckwheat is a great source of resistant starch, which acts as a prebiotic fuel for beneficial gut bacteria. It also contains rutin, a flavonoid linked to antioxidant and anti-inflammatory benefits. In this recipe, soba noodles provide a satisfying base while supporting gut health with every bite. 

Edamame & Snow Peas: These fiber-rich greens bring plant-based protein, texture, and gut-loving compounds to the mix—all while supporting microbial diversity.

Red Bell Pepper, Carrots & Scallions: Bright colors = diverse phytonutrients. These veggies offer a wide range of plant compounds, from beta-carotene to quercetin, helping your microbiome thrive.

Spicy Peanut Sauce: Our creamy, flavor-packed sauce (from our archive!) features powdered peanut butter, tamari, rice vinegar, and 3 tablespoons of just better.® prebiotic fiber. It ties everything together with bold flavor and a gut-supportive boost. 

Ready to turn all that colorful, gut-loving goodness into dinner? Let’s get this stir-fry going! 🥢💚

Ingredients

For the stir-fry:

6 oz soba noodles (100% buckwheat, if gluten-free)

1 cup shelled edamame (steamed or thawed from frozen)

1 red bell pepper, thinly sliced

1 cup snow peas or sugar snap peas, trimmed

1 medium carrot, julienned or shaved into ribbons

2 scallions, sliced

Fresh cilantro or Thai basil for garnish (optional)

1–2 teaspoons avocado oil (for stir-frying)

For serving: 

1 batch Spicy Peanut Sauce (You can find it here!)

Lime wedges (optional)

Crushed peanuts or sesame seeds (optional)

Instructions

Prep the vegetables first. Slice, shave, or trim all the veggies so they’re ready to go. Steam or microwave the edamame if using frozen.

Heat avocado oil in a large non-stick skillet or wok over medium-high heat. Add the bell pepper, snow peas, and carrots. Stir-fry for 5–6 minutes, stirring often, until the vegetables are crisp-tender and slightly golden in spots.

While the veggies are cooking, bring a pot of water to a boil and cook the soba noodles according to package directions. Soba noodles cook quickly, so keep an eye on them. Drain and rinse immediately under cool water to stop the cooking and prevent sticking. Set aside briefly.

Add the edamame and soba noodles to the skillet with the cooked veggies. Toss gently to combine and warm everything through, about 1–2 minutes.

Remove from heat and drizzle in your prepared just better.® Spicy Peanut Sauce. Toss gently until everything is evenly coated.

Serve immediately, topped with scallions, fresh herbs, lime wedges, or a sprinkle of crushed peanuts or sesame seeds if desired.  

Optional Protein Add-Ins

Want to add extra staying power to your stir-fry? This dish pairs well with a variety of protein options:

• Pan-seared tofu or tempeh for a plant-based boost 

• Grilled or roasted chicken for an easy classic 

• Shrimp or baked salmon for a seafood twist 

• A soft-boiled or jammy egg for a quick topping 

• Leftover roasted chickpeas or lentils for extra fiber and texture

No matter what you choose, this stir-fry is built to adapt. Just layer your protein on top or toss it in before serving—whatever works best for your plate.

Cooking with just better.®

Our Prebiotic Spicy Peanut Sauce isn’t just for flavor—it’s made with 3 tablespoons of just better.® prebiotic fiber to nourish your gut while adding creamy, bold flavor to any dish. From noodles to grain bowls to wraps, this sauce is a fiber-friendly favorite you’ll want to keep on repeat.

This stir-fry is all about color, crunch, and keeping things interesting in the kitchen. With simple prep and flexible ingredients, it’s a weeknight win that supports your gut and keeps your plate anything but boring. Here’s to eating the rainbow—and loving every bite. 🌈