1 ¼ lbs Brussels sprouts , cut in half (about 5 cups)
6 slices bacon , cut into 1-inch pieces
1 tablespoon butter or 1 tablespoon margarine
1 large onion , finely chopped (1 cup)
1 tablespoon all-purpose flour
¼ teaspoon dried thyme leaves
¼ teaspoon pepper
¾ cup half-and-half
2 teaspoons chicken bouillon granules
1⁄3; cup shredded parmesan cheese
½ cup shredded cheddar cheese