Grilled Tuna with Mediterranean Sauce

1/4 cup olive oil 1 large yellow onion, thinly sliced 1 (14.5-ounce) can diced tomatoes, undrained 1/2 cup pitted green olives, such as Picholine 1/2 cup[...]

3/4 cup fresh basil leaf 2 tablespoons butter , softened 1 tablespoon fresh lemon juice 1/4 teaspoon salt 2 garlic cloves 1 Prepare grill or preheat broiler.[...]

1/4 cup soy sauce 1 tablespoon ketchup 1/4 cup water 3 tablespoons honey 1 tablespoon brown sugar 2 tablespoons grated fresh ginger 1 tablespoon olive oil 1[...]

6 (5 ounce) tuna steaks 1 tablespoon garlic oil 1 cup zucchini , sliced 1 red onion , sliced thick 3 russet potatoes , sliced thick 1/2 cup garlic oil 1/4 cup[...]