Easy Tuna Tetrazzini

Ingredients

• 8 oz spaghetti or linguine
• 2 tbsp unsalted butter
• 1 medium onion, chopped
• 2 cloves garlic, minced
• 8 oz mushrooms, sliced (button or cremini)
• 1/4 cup all-purpose flour
• 2 cups chicken broth or vegetable broth
• 1 cup heavy cream
• 1 can (15 oz) canned tuna, drained and flaked
• 1 cup frozen peas
• 1 cup grated cheddar cheese or a blend of cheese
• Salt and black pepper to taste
• 1/2 tsp dried thyme (optional)
• 1/2 cup breadcrumbs (optional)