Grilled Tuna Burgers

1 pound fresh tuna -- ground
4 cloves garlic -- minced
1 teaspoon cayenne
1 tablespoon brown mustard
1/2 teaspoon salt

Mix everything and make into 3 patties. Grill over high heat for 3 minutes per side. They should be reddish/pink on the inside. Serve on a bun with a slice of sweet or red onion, lettuce and habanero-cilantro-lime mayonnaise.