Step 1: Make the dough by mixing masa harina, water, and salt into a smooth, non-sticky dough, then divide into 20 portions.
Step 2: Create masa cakes by pressing masa balls into thick discs between plastic sheets and cooking them on a hot skillet until brown spots form.
Step 3: Pinch the edges and middle of the cakes to create ridges.
Step 4: Top the cakes with salsa, onions, cheese, and a drizzle of lard or olive oil.
Step 5: Enjoy your delicious picaditas hot off the skillet!