Grilled Sesame Tuna with Pineapple

Whisk together first 4 ingredients until well blended, then whisk in olive oil

Brush pineapple slices lightly with mixture; set aside. Spoon remainder over tuna, coating evenly. Refrigerate for 30 min., turning occasionally

Meanwhile, oil grates and preheat grill to medium-high. Sprinkle sesame seeds evenly over tuna (if using)

Carefully arrange pineapple on the grill. Cook pineapple until heated through with well-formed grill marks, about 2 to 3 min. per side. Remove from grill and set aside

Arrange tuna steaks on the grill. Cook until an instant-read thermometer reads 125? (medium-rare), about 6 min., turning halfway through. Transfer to a warm platter and rest 5 min

Cut tuna into 1" slices. Roughly chop pineapple into bite-sized pieces. Serve warm with steamed basmati rice