Crispy Bean Tostadas with Smashed Avocado and Jicama-Cilantro Slaw

Ingredients (19)

• 1/2 medium red onion, thinly sliced
• Juice of 1 lime
• 1 tablespoon white vinegar
• Pinch of salt
• 2 cups shredded green cabbage
• 1/2 cup fresh cilantro leaves
• 1/2 cup 1/4-inch-thick slices peeled jicama, or additional shredded cabbage
• Juice of 1 lime
• 1/2 teaspoon ground cumin
• 1/2 teaspoon chili powder
• Salt and freshly ground black pepper, to taste
• 6 corn tortillas
• Extra-virgin olive oil or cooking spray
• Salt, to taste
• 2 cans (16 ounces each) vegetarian refried beans, or 1 batch homemade refried beans
• 3 large ripe avocados, pitted and peeled
• Juice of 1 lime
• 1/2 cup halved grape tomatoes
• 1/2 cup crumbled queso fresco or feta cheese