Goat Butter Burger with Mushrooms & Oven-Dried Tomatoes

Ingredients

• 20 ounces ground goat divided into 4 patties, seasoned with salt and pepper (recommend 75/25 lean-to-fat ratio)
• 4 pretzel buns, buttered and griddled crisp
• Roasted onions, oven-dried tomatoes, 12 ounces mixed mushrooms and seasoned butter for serving (recipes below)
• 1 stick salted butter, room temperature
• 1 tablespoon minced parsley
• 1 tablespoon finely minced shallots
• 1 tablespoon minced tarragon
• 1/2 teaspoon ground white pepper
• 2 tablespoons lemon juice
• 1/2 teaspoon Coleman’s dry ground mustard
• 2 onions, peeled, bloom end left on but trimmed so that onion pieces stay together when cut
• 12 Roma tomatoes
• 3 tablespoons olive oil
• 12 ounces wild mushrooms (try growing your own oyster mushrooms)
• 1 tablespoon butter
• Salt
• pepper