Stuffed Mushrooms with Harissa Sauce

Ingredients

• 1 roasted red pepper, peeled and minced
• 2 tbsp chopped shallot
• 1 tsp minced garlic
• 1 tsp olive oil
• 1 tsp chopped fresh mint
• 1 tsp lime juice
• ¾ tsp Dijon mustard
• ½ tsp minced fresh cilantro
• ½ tsp salt
• ¼ tsp red pepper flakes
• 1 pinch ground coriander
• 1 pinch ground black pepper
• 1 pinch cayenne pepper
• 2 cups canned cannellini beans
• 2 cups water, or as needed
• 2 tsp truffle oil
• ¼ tsp ground black pepper
• 2 large portobello mushroom caps
• 2 tsp olive oil
• ½ cup vegetable broth
• ¼ tsp salt