Add 2 tablespoons of olive oil to a large skillet. Heat over medium-high until the oil is shimmering. Add the seasoned tuna steaks and cook each steak for 2 minutes on each side. Remove the tuna from the skillet and set aside to rest.

Make the pepper relish. In a bowl, mix the peppers, shallots, capers, vinegar, and parsley. Taste and adjust for salt.

Once the tuna steaks have rested for at least 10 minutes, slice them into 1-inch pieces and plate.

Pour the pepper relish over the tuna and top with crispy shallots (see next recipe).