Preheat the oven to 425° F.
In a large skillet, heat the olive oil over high heat. When the oil shimmers, add the ground meat, onion, and poblano pepper. Cook, breaking up the meat as it cooks until the chicken is browned, about 5 minutes. Add the tomato paste, chili powder, paprika, cumin, garlic powder, and salt. Add 1 cup water. Reduce the heat to medium and simmer until the sauce has thickened slightly around the chicken, about 10 minutes. Keep warm over low heat.
Meanwhile, make the tostadas. Line the corn tortillas up on 2 baking sheets and rub lightly with olive oil. Transfer to the oven and bake 7 minutes, until crisp. In a small bowl, combine the parsley, paprika, chili powder, onion powder, garlic powder, chives, dill, and 1 teaspoon salt. While warm, sprinkle the "cool ranch" seasoning blend over each tostada.
To make the tosta-dillas, evenly divide the Mexican cheese blend between half the tostadas, then place the remaining tostada shells directly on the cheese. Bake 5 minutes, until the cheese is melted.
To assemble, plate each tostadilla and top evenly with mashed avocado and chicken. Top as desired with cabbage, jalapeños, and cilantro. Dollop over the crema.
Honey Lime Crema: In a bowl, combine 1/2 cup plain Greek yogurt or sour cream, 1-2 teaspoons honey, the zest of 1 lime, and a pinch of sea salt.
Lime Mashed Avocado: In a bowl, lightly smash 2 avocados. Add the zest and juice of 1 lime and a pinch of sea salt.