Preheat your oven to 425°F and line two baking sheets with parchment paper. While the oven heats, chop your zucchini into half-inch pieces and your bell peppers into medium chunks, keeping pieces roughly uniform for even cooking.

Toss zucchini and bell peppers with 1.5 tablespoons olive oil, salt, and pepper on each baking sheet. Roast for 20-25 minutes, stirring halfway through, until vegetables develop golden edges and soften completely.

Meanwhile, prepare your dressing by whisking together remaining olive oil, balsamic vinegar, lemon juice, minced garlic, salt, and pepper in a small bowl. Set aside while roasted vegetables finish cooking.

Assemble your cozy summer grain bowl dinner recipe by dividing cooked quinoa evenly among four serving bowls. Layer fresh spinach on top while quinoa remains warm—the heat will gently wilt the greens without cooking them completely.

Arrange roasted vegetables, cherry tomatoes, cucumber, chickpeas, and fresh basil in neat piles around each bowl. Drizzle with prepared dressing and finish with crumbled feta cheese.

If using chicken, place grilled pieces directly over warm quinoa before adding vegetables. The warm grain bowl will gently heat the chicken through while maintaining perfect texture.