Unroll dough; unfold layers (do not separate into strips).
Place layers lengthwise, end to end, into an 11 x 7-inch baking dish coated with cooking spray. Pinch ends in the middle to seal; press dough up sides of dish. Set aside.
Heat vegetable oil in a large nonstick skillet over medium-high heat.
Add onion, garlic, and jalapeo; saut 3 minutes or until soft.
Add corn and the next 5 ingredients (corn through broccoli); saut for 5 minutes or until vegetables are soft and liquid evaporates.
Remove from heat, and cool 5 minutes.
Combine milk, egg whites, egg, and salt; stir well with a whisk.
Sprinkle cheese over dough. Spoon broccoli mixture evenly into pan.
Pour milk mixture over broccoli mixture.
Place dish on a baking sheet.
Bake at 350 for 45 minutes; cover and bake for an additional 10 minutes or until set.