Bacon and Butternut Pasta

INGREDIENTS

5 cups

(1/2-inch) cubed peeled butternut squash

1 tbsp

olive oil

Cooking spray

12 oz

uncooked ziti (short tube-shaped pasta), campanile, or other short pasta

4 cups

chopped kale

bacon slices

2 cups

vertically sliced onion

1 tsp

salt, divided

garlic cloves, minced

2 cups

fat-free, lower-sodium chicken broth, divided

2 tbsp

all-purpose flour

1/2 tsp

crushed red pepper

1 cup

crème fraîche

1/3 cup

(about 1 1/2 ounces) shredded Gruyère cheese