Grapefruit Avocado Fruit Salad

Ingredients

• 1/2 shallot, minced
• 1/2 tsp serrano pepper, minced
• 2 tsp cilantro, minced
• 1/2 cup olive oil
• 3 tbsp lime juice
• 1 1/2 tsp lime zest
• 1/4 tsp sea salt
• 1 tsp sugar
• 2 grapefruit, supreme
• 2 avocado, sliced
• lettuce