Make this recipe a recipe that people in that category can eat. categories: ['low_sugar'], recipe: add 1 tbs. olive oil to small saute pan. add onions and cook until tender. add tomatoes to onion and let cook until tomatoes begin to lose their shape. turn heat to medium/low and add 2 tbs. balsamic vinegar to onion and tomato mixture. stir and let simmer while you prepare the fish. coat a large frying or saute pan with olive oil over medium heat. season fillets with salt and pepper then add to pan. the fish will cook very quickly. try to flip only once. the fish is done when it begins to flake easily - in about 4-5 minutes total. to serve, plate fish and spoon the tomato/onion mixture over the fish - about 1/4 cup per fillet. serve immediately.

Target recipe: sprinkle the tuna with the salt and pepper. heat the oil in a large nonstick skillet set over medium high. add the tuna and cook 2 minutes on each side, or until cooked almost to desired degree of doneness. the tuna will continue to cook slightly after it is removed from the pan. two minutes on each side will result in a pink, not red, center. after removing the tuna from the pan, add the vinegar and orange juice and cook, stirring, until the liquid begins to turn to a syrup. to test, drag a spoon through the liquid along the center of the pan; the path of the spoon will not fill in quickly as the liquid becomes syrupy. drizzle the syrup over the tuna and serve immediately.