Seeds came from Angelina.

Catalog notes:

Mind-blowing yields of huge, juicy, and delicious fruit! Indeterminate, mid-season, tall grower, strong disease resistance. One of the highest yielders around!

Total stunner! Put it in the ground as a tiny start, no more than 8 inches (20 cm) tall. It took hold immediately, bulked up, took off with crazy vigor, and cranked out a serious haul of these hefty, flattened whoppers! And delicious to boot!

Megamutt sliced open showing meaty interior, photo by Yulya
Megamutt massive flattened beefsteak on the vine