Tu-No Casserole (Vegan Tuna Casserole)

Ingredients (for 8 servings)

• 2.5 cup — plant milk
• 0.5 cup — unsalted cashews
• 1 tsp — granulated onion
• 0.5 tsp — black pepper
• 1 tbsp — kelp granules or kelp powder
• 1.5 cup — uncooked elbow or small-shell pasta
• 1 whole — yellow onion
• 8 whole — cremini or white mushrooms
• 2 cup — green peas
• 3 cup — garbanzo beans