zucchini au gratin

Ingredients

• 4-5 - zucchinis, shredded
• 1 1/2 cups chicken or beef broth
• 2 - red onions, sliced thinly
• 2 teaspoons garlic, chopped
• 1 cup heavy cream or whole milk
• 2 cups sharp cheddar, shredded
• 1/2 stick butter, cubed
• 1 - egg, beaten
• 1 teaspoon paprika
• 1 teaspoon dijon mustard
• 3 tablespoons sherry
• 1 teaspoon dill
• 1 teaspoon italian seasoning
• 1 cup seasoned panko
• - sliced muenster cheese, cut into smaller pieces
• - salt and pepper to taste