Ingredients:2 teaspoons olive oil 1 medium onion, diced 2 cloves garlic, minced 1 (15.5-ounce) can black beans , preferably low-sodium, drained and rinsed 1 tablespoon minced chipotle pepper in adobo 4 tablespoons lime juice 1/4 teaspoon ground cumin 1 tablespoon water 1/2 teaspoon salt 2 cups corn kernels (10-ounce box frozen corn) 1/4 cup chopped cilantro leaves 2 ripe avocados 4 medium tomatoes, seeded and diced (about 2 cups) 1/4 cup thinly sliced scallion 1 tablespoon finely diced jalapeno pepper, optional 3/4 cup shredded extra-sharp Cheddar DirectionsHeat the oil in a skillet over medium-high heat. Add onions and cook until they soften, about 3 minutes. Stir in the garlic and cook for 2 minutes more. Put half of the onion mixture into a food processor with the black beans, chipotle pepper, 2 tablespoons of the lime juice, cumin, water and salt. Puree until smooth. Set aside. Add the corn to the skillet with the remaining onion mixture and cook for about 3 minutes. Remove from the heat and stir in the cilantro leaves. In a small bowl mash the avocado with the remaining lime juice. In a medium bowl toss together the tomatoes, scallion and jalapeno, if using. Season tomato mixture with salt and pepper, to taste. Spread the black bean dip into the bottom of an 8 by 8 glass baking or serving dish. Top with the corn mixture, spreading it out to form a single layer over the beans, repeat with the avocado, then the tomatoes. Top with cheese. Serve with chips.