Mix masa harina, warm water, and salt until a soft dough forms
Knead the dough until smooth
Divide the dough into small balls
Flatten each ball into a thick disk
Cook the disks on a hot dry skillet or griddle until lightly browned on both sides
While still warm, pinch the edges to form a raised rim
Heat oil in a skillet
Fry each sope until crisp and golden
Drain on paper towels
Top with refried beans, meat, lettuce, cheese, salsa, and crema