Volcano BBQ Sushi Bowl with Spicy Tuna and Avocado

By Lauren Mitchell, Test Kitchen Director · Reviewed by AislePrompt Editorial · Published 2026-07-09 · Updated 2026-07-09

A vibrant sushi bowl layering spicy tuna, BBQ grilled vegetables, and creamy avocado over seasoned sushi rice. This asian fusion-inspired rice & grains ready in about 35 minutes pairs cooked and cooled sushi rice, rice vinegar, sugar for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 520 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. 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 cups, cooked and cooled sushi rice
• 3 tbsp rice vinegar
• 1 tbsp sugar
• 1 tsp salt
• 8 oz, diced into 1/2-inch cubes fresh tuna
• 2 tbsp Sriracha sauce
• 2 tbsp mayonnaise
• 1 small, sliced into 1/4-inch thick rounds zucchini
• 1 medium, cut into strips red bell pepper
• 1 cup, sliced shiitake mushrooms
• 2 tbsp soy sauce
• 1 tbsp sesame oil
• 1 medium, sliced avocado
• 2, sliced thinly green onions
• 1 tbsp toasted sesame seeds

Instructions

1. Step 1: In a small saucepan, combine 3 tbsp rice vinegar, 1 tbsp sugar, and 1 tsp salt. Warm over low heat until sugar dissolves. Pour mixture over 2 cups cooked sushi rice and gently fold to combine. Let cool to room temperature.
2. Step 2: In a bowl, mix 8 oz diced fresh tuna with 2 tbsp Sriracha sauce and 2 tbsp mayonnaise until evenly coated, creating spicy tuna.
3. Step 3: Heat a grill pan over medium-high heat. Toss 1 small sliced zucchini, 1 medium red bell pepper strips, and 1 cup sliced shiitake mushrooms with 1 tbsp soy sauce and 1 tbsp sesame oil. Grill vegetables for 3-4 minutes per side until tender and slightly charred.
4. Step 4: To assemble, place 1 cup seasoned sushi rice in each bowl. Top with half the spicy tuna mixture, grilled vegetables, and 1/2 sliced avocado. Garnish with 1 sliced green onion and sprinkle 1/2 tbsp toasted sesame seeds per bowl.