Preheat oven to 350F.
Prepare the lentil "meat." Sauté minced garlic and chopped onion in oil in a saucepan over medium high heat until fragrant. Rinse and drain dry lentils and add them to the saucepan along with the vegetable broth, cumin, and chili powder. Cover and simmer until cooked, about 30 mins. Season with salt and pepper to taste when done.
Meanwhile, prepare the chips. Spray both sides of corn tortillas with oil. Quarter corn tortillas so they are cut into chip-size wedges. Toss them with the salt, cumin, and chili powder, and place them on a baking sheet, making sure they don't overlap. Bake for 20-25 mins, until crispy.
Meanwhile, marinate the watermelon radish if desired. Slice the radish into very thin rounds and marinate in a shallow bowl with the juice of one lime while you prepare the other toppings.
Blend all ingredients for chipotle queso in a high speed blender for about 1 minute, until smooth, and set aside.
Mash the avocado and mix in the juice of ½ a lime, ½ teaspoon sea salt, and half of the chopped cilantro. Set aside.
Assemble your nachos! Layer the chips and marinated radishes with the lentil taco meat. Top with heirloom tomatoes, prepared guacamole, and corn. Drizzle with a generous amount of nacho cheese. Sprinkle with chopped cilantro and pomegranate seeds and enjoy!