Tuna, like other fish, is a good source of omega-3 fatty acids. But limit your intake of tuna and other large fish like tile fish and shark, which have high contents of mercury.
Combine first 5 ingredients; set aside.
Combine chili powder and 1/4 teaspoon salt. Rub tuna with chili powder mixture; coat with cooking spray. Place a large nonstick skillet over medium-high heat until hot; add tuna. Cook 3 minutes on each side or until desired degree of doneness. Serve with sour cream mixture.
Cooking Light Superfast Suppers