Cheesesteak Pasta Skillet

Ingredients

• 1 tablespoon olive oil
• 1 large yellow onion, halved and sliced into 1/2-inch-thick slices
• 1 teaspoon kosher salt, divided
• 1 medium red bell pepper, sliced into 1/2-inch-thick slices
• 1 clove garlic, minced
• 1 pound ground chuck
• 1/2 teaspoon finely ground black pepper
• 8 ounces rotini pasta
• 2 (14.5-ounce) cans low-sodium chicken broth
• 1 1/2 cups provolone cheese, shredded, divided
• 1 1/2 cups pepper jack cheese, shredded, divided