Avocado Tofu Pasta Salad

• 2 cups dry pasta (around 6 ounces)
• 1 large avocado or 2 small ones
• ¼ cup onion, diced
• 2 tbsp Dijon mustard
• 1 tbsp lemon juice
• ½ tbsp maple syrup or sugar
• ½ tsp salt
• ½ tsp ground black pepper
• 1 tsp garlic powder

Optional add-ins (pick at least two)

• 1 bell pepper, diced
• 1 rib celery, diced
• ½ cup corn kernels
• 1 block smoked tofu, diced or shredded
• ½ carrot, shredded