DirectionsHeat oil in a 2 quart saucepan over medium heat.
Cook onion until tender, stirring occasionally.
Remove from heat.
Stir in spinach, egg, cheese and pepper.
With knife, cut phyllo lengthwise into 2-inch wide strips.
Place strips on waxed paper, then cover with slightly damp towel.
Brush top of one strip of phyllo with melted butter; place 1 teaspoonful spinach mixture at short end of strip.
Fold one corner of strip diagonally over filling so the short edge is parallel to or meets the long edge, forming a right angle.
Continue folding over at right angles until you reach the end of the strip, to form a triangular package.
Repeat with remaining phyllo strips and spinach filling.
Preheat oven to 425F.
Place packages seam side down in a 15-1/2x10-1/2 jelly pan.
Brush with butter.
Bake triangles 15 minutes or until golden brown.