Name: Mushroom Melts with Mustard Aioli
Total time: 15 min
Yield: 2
Ingredients: 8 ounces sliced cremini mushrooms; 1 tablespoon unsalted butter; 1 tablespoon olive oil; 3 garlic cloves, (minced or pressed); a pinch of salt + pepper; 4 slices whole grain bread; 6 ounces fontina cheese, (freshly grated); 1 1/2 tablespoons dijon mustard; 1 large egg yolk; 2 teaspoons fresh lemon juice; 1/2 cup olive oil; 2 tablespoons whole grain mustard; 1 tablespoon horseradish; a pinch of salt + pepper