Crispy Bean Tostadas with Smashed Avocado and Jicama-Cilantro Slaw

Bahan-bahan (3 porsi)

• ½ medium red onion, thinly sliced
• Juice of 1 lime
• 1 tablespoon white vinegar
• Pinch of salt
• 2 cups shredded green cabbage
• ½ cup fresh cilantro leaves
• ½ cup ¼-inch-thick slices peeled jicama, or additional shredded cabbage
• Juice of 1 lime
• ½ teaspoon ground cumin
• ½ 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 can s (16 ounces each) vegetarian refried beans, or 1 batch homemade refried beans
• 3 large ripe avocados, pitted and peeled
• Juice of 1 lime
• ½ cup halved grape tomatoes
• ½ cup crumbled queso fresco or feta cheese