Creamy Broccoli Cheddar Casserole with Garlic Butter Pretzel

Ingredients

• 3/4 cup warm water
• 2 1/4 teaspoons instant yeast
• 4 tablespoons salted butter, melted
• 2 1/2 cups all-purpose flour
• 1/4 cup baking soda
• 1 egg, beaten
• pretzel salt (for sprinkling)
• 3 tablespoons extra virgin olive oil
• 1 tablespoon salted butter
• 1 yellow onion, chopped
• 1/4 cup all-purpose flour
• 3 cloves garlic, chopped, 1 clove, grated
• 1 teaspoon paprika
• 1/4 teaspoon cayenne, more or less to taste
• 2 tablespoons fresh thyme leaves
• 3 cups low sodium veggie or chicken broth
• 4 cups broccoli florets, chopped
• kosher salt and black
• 2 cups whole milk
• 2 1/2 cups shredded sharp cheddar cheese