An excellent one that tastes like Lasagna is:

[Sophie87]

CHEESY POLENTA CASSEROLE with ROASTED BELL PEPPER SAUSE
2 C tomato & basil pasta sauce (like Muir Glen)
1/4 C chopped pitted kalamata olives
1 T. balsamic vinegar
1/4 t. freshly ground black pepper
1 (7 oz) bottle roasted red bell peppers drained and sliced
Cooking Spray
1 (16 oz) tube of polenta, cut into 12 slices
1/4 C (3 oz or more) shredded part skim mozzarella cheese
2 T grated fresh Parmesan cheese
1 Preheat oven to 350
2 Combine 1st 5 ingre. in a med saucepan , bring to simmer over med heat, Cook 10 min stirring sauce occasionally
Spread 1/2 C sauce in bottom of square baking dish coated w/ cooking spray.
Arrange polenta slices over sauce, spread remaining slices over the polenta. Sprinkle w/ cheeses.
Bake at 350 for 20 min or until bubbly.
Yield 4 servings