Grilled Tuna without pear adobo milk

1 each onion sliced 1 each garlic clove minced, pressed 1/2 cup chicken broth 2 cans albacore tuna 1/2 cup celery minced 2 tablespoons mayonnaise 8 slices[...]

6 each tuna steaks about 5 ounces each * 1 tablespoon garlic oil * 1 cup zucchini sliced diagonally 1 each red onion thickly sliced 3 each russet potatoes[...]