1. Fry bacon with onion in large skillet over medium heat until bacon is crisp, about 10 minutes.
2. Stir in chopped collard greens, sprinkle with salt, black pepper, and 1/2 teaspoon of the greens seasoning; cook and stir for 5 minutes.
3. Add in darker chopped cabbage leaves, and cook and stir until almost tender, about 5 minutes. Stir in remaining cabbage; season with salt, black pepper, sugar, and the remaining greens seasoning. Stir well; cover and cook until tender, stirring occasionally so that the greens do not scorch about 10 minutes.
Serve warm! Delicious with grilled fish or chicken and boiled potatoes.