Best Ever Vegan Mushroom Gravy

Ingredients

• 2 tablespoons olive oil
• 1 large onion, chopped
• 4 cloves garlic, minced
• 8 oz mushrooms, sliced
• 1 tablespoon tomato paste
• 1 teaspoon dried thyme
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 cup vegetable broth
• 1/4 cup all-purpose flour
• 1/2 cup unsweetened non-dairy milk