Puree 3/4 can peaches by placing slices only, no juice in a blender or food processor. Pulse couple of times to get a chunky (apple sauce) texture.
Heat skillet or griddle on medium-high heat with shortening. In a small bowl or cup, whisk egg and oil. In medium mixing bowl, combine pancake mix, milk, egg and oil mixture and brown sugar.
Whisk until smooth and bumpy. (Don't mix too much, pancakes will be tough) Fold in peach puree.
Pour mixture into hot skillet a cup at a time to create large puddles of dough. Turn once, after bubbles appear in dough ovals. Cook in batches. Pancakes should be browned.
