Vegan Mushroom Ceviche

Name: Vegan Mushroom Ceviche
Ingredients: 3 tablespoons olive oil; 2 cloves garlic, chopped; 3 (8 ounce) packages fresh white mushrooms, chopped; salt to taste; 6 tomatoes, chopped; 2 carrots, grated; 1 white onion, chopped; 2 tablespoons chopped fresh cilantro; 1 fresh serrano pepper, seeded and chopped; 1 pickled jalapeno pepper, seeded and chopped; 0.5 cup lime juice; 0.5 cup tomato juice; 0.5 cup ketchup; 2 tablespoons pickled jalapeno pepper juice; 2 avocados - peeled, pitted, and sliced