Prepare tofu by draining water from package and rinsing gently, but thoroughly under running water.  

Cut tofu block in half vertically.  Then cut that block into 1/2" (approx.) slices. (Store remaining half tofu block in fresh water in a container with a lid, in the fridge.)

Measure cornstarch and spread out on plate. 

Heat oil in frying pan on medium-high heat. (Be careful of hot spattering oil.) Meanwhile, coat moist tofu, all over, in a light layer of cornstarch. Fingers work best for this task.

Carefully, by hand, lift each coated tofu slice and set in hot oil.  Watch for signs of crisping & browning on the pan-down side of the tofu (3-5 minutes /side [approx.]) Turn tofu over, by squeeze pressure Gently, lift browned tofu and turn over to cook other side. Drain on paper towel blotter.

Serve immediately.

Optional: Mix 1/2 tsp (light) mayo with 1/2 tsp hot sauce in desired ratio. Dip tofu tidbit in soy, then in 'spicy mayo' as desired

Optional: Mix 1/2 Tempura dipping sauce according to bottle directions. Divide dipping sauce into serving bowls.  Set prepared tofu slices in liquid.