Grilled Vegetable Souvlaki with Tzatziki Sauce

By Lauren Mitchell, Test Kitchen Director · Reviewed by AislePrompt Editorial · Published 2026-04-30 · Updated 2026-04-30

Skewers of marinated zucchini, bell peppers, and red onion grilled to smoky perfection, served with a creamy cucumber and yogurt tzatziki. This mediterranean-inspired vegetarian (vegetarian) ready in about 42 minutes blends medium red onion, cut into wedges, extra virgin olive oil, fresh lemon juice into a versatile sauce that lifts everything from grain bowls and roasted vegetables to grilled proteins — a small-batch staple worth keeping in the fridge. Each serving lands at about 150 calories and feeds 4, so a small batch covers several meals across the week without taking over the fridge. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 2 medium zucchini, sliced into 1/2-inch rounds
• 1 large red bell pepper, cut into 1-inch pieces
• 1 large yellow bell pepper, cut into 1-inch pieces
• 1 medium red onion, cut into wedges
• 4 tbsp extra virgin olive oil
• 2 tbsp fresh lemon juice
• 1 tbsp dried oregano
• 1 tsp salt
• 1/2 tsp black pepper
• 1 cup Greek yogurt
• 1/2 medium cucumber, grated and excess water squeezed out
• 1 clove garlic clove, minced
• 1 tbsp fresh dill, chopped
• 1 tsp white wine vinegar

Instructions

1. Step 1: In a large bowl, whisk together 4 tbsp extra virgin olive oil, 2 tbsp fresh lemon juice, 1 tbsp dried oregano, 1 tsp salt, and 1/2 tsp black pepper. Add 2 sliced zucchinis, 1 large red bell pepper cut into 1-inch pieces, 1 large yellow bell pepper cut into 1-inch pieces, and 1 medium red onion cut into wedges. Toss well to coat and marinate for 20 minutes.
2. Step 2: While vegetables marinate, prepare tzatziki by combining 1 cup Greek yogurt, 1/2 grated cucumber with excess water squeezed out, 1 minced garlic clove, 1 tbsp chopped fresh dill, and 1 tsp white wine vinegar in a bowl. Mix well and refrigerate.
3. Step 3: Preheat grill or grill pan to medium-high heat. Thread marinated vegetables onto skewers, alternating colors and types.
4. Step 4: Grill the vegetable skewers for about 10-12 minutes, turning every 3 minutes until the edges are slightly charred and vegetables are tender.
5. Step 5: Serve hot vegetable souvlaki with a generous dollop of chilled tzatziki sauce on the side.