1. Grease bottom only of 13 x 9-inch pan.
2. Sprinkle marshmallows evenly over bottom of pan; set aside.
3. Thoroughly combine thawed strawberries and syrup with Jello; set aside.
4. In large mixer, combine remaining ingredients.
5. Blend at low speed until moistened; beat 3 minutes at medium speed.
6. Carefully pour batter evenly over marshmallows in pan.
7. Spoon strawberry mixture evenly over batter.
8. Bake at 350 degrees for 45-50 minutes until golden brown and toothpick inserted in center comes out clean.
9. Serve warm or cool with ice cream or whipped cream.