Don't get the carne asada fries or the tostada + taco combo. Both are HORRIBLE!
1) Carne Asada Fries: First, the cheese was not melted at all. Second, the carne asada had no flavor. It just tasted like rubber. There were also beans in the carne asada fries which was the first. If you get a chance, try the carne asada fries in San Diego, and you'll realize why this dish at Ricardo's is horrendous.
2) Tostada + Taco: Tostada was not flavorful at all. Tasted like canned beans spread on top of a crispy taco shell with lettuce. The taco was similar to the tostada, except their was some type of meat which also had no flavor.
I'd recommend going to Del Taco for more authentic flavors.