Season steaks, if desired, with salt and freshly ground black pepper.
Melt margarine in 12-inch nonstick grill pan or skillet over medium-high heat and cook steaks, turning once, 8 minutes or until desired doneness
Meanwhile, blend sour cream, garlic powder, red pepper, salt, paprika and sugar in medium bowl. To serve, arrange steaks on tomato slices, then top with sour cream mixture. Serve with Knorr® Cajun Sides™ - Red Beans & Rice.