Panfry desired number of frozen 2 oz beef cube steaks over medium-high heat, turning to brown both sides. (If using 4 oz beef minute steaks, melt 1 tbsp shortening in skilled before cooking steaks.) Season with salt and pepper. Remove steaks; keep warm.
To make gravy, drain fat from skillet. For each serving, pour about 1/3 cup water into skillet. Heat to boiling, scraping brown particles from bottom of skillet. for each cup of water, stir in 1/2 tsp seasoned salt or 1 tsp. instant beef bouillon.
Set oven control at broil and/or 550F. Place desired number of buttered 1/2" slices French bread or hamburger bun halves on ungreased baking sheet. Sprinkle bread with garlic salt. Place sheet on broiler rack about 4" from heat; toast until golden brown.
Place steaks between toasted bread slices; cut in half. Serve gravy in individual small bowls. Each person can "dunk" his or her own sandwich or pour gravy over it.