Preheat your oven to 350°F (175°C). Bring a large pot of salted water to a boil, add cabbage wedges and cook for about 10 minutes. Drain well and set aside.

In a large skillet, melt butter over medium heat. Add chopped onion and green bell pepper with sugar. Sauté for 5-7 minutes until tender. Stir in drained tomatoes, salt, and black pepper.

In a greased baking dish, arrange drained cabbage wedges. Pour the sautéed vegetable mixture over the cabbage, then sprinkle cheddar cheese on top.

Bake for 25-30 minutes or until the cheese is bubbly and golden brown.