Grilled Tuna With Pepper Sauce

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Details

10 Ingredients

• 2 Tbsps extra-virgin olive oil, plus more for brushing
• 1 small onion, coarsely chopped
• 2 yellow bell peppers, coarsely chopped
• 1 medium Yukon Gold potato—peeled, halved lengthwise and sliced crosswise paper-thin
• 1 cup water
• Salt
• 1 Tbsp fresh lemon juice
• Freshly ground pepper
• Eight 6-oz tuna steaks, 1 inch thick
• Sage leaves, for garnish