Monster Tomato, saving seed

It's green. It has many arms. It's taking over the garden!

What is it?

Last year, I had many volunteer tomatoes and in a moment of weakness I let many grow. Only one was an interesting plant. The rest produced large beefstake types that were spindly (probably because they were growing in a tangle with squash and beans) and only had a few tomatoes each. The star was the first to flower and produce in the garden, laughed at the chilly (not frosty) nights, had dependable flavour throughout the season and was still pumping them out on comparably disease free branches until last frost.

I would be bowing before this tomato plant if it had a more exciting flavour. As I said, it is dependable, always the same from the first tomato to the last. That is not terribly sweet but not bad tasting, a little tart, but definitely worthy of being in a salad.

I saved the seed last year and planted it again this year. Well it made a strong very fast very fast very fast (no typo) growing plant. It seems to be as wide as it is tall, dwarfing all other plants in its garden row. It also is loaded with mid-sized fruit already. I suppose I should have expected this as it had started itself from seed last year in the open garden and was still the first to produce.

Where did it come from?

It wasn't a variety that I had grown so I imagine that it was from a store brought tomato that was thrown into the compost - probably part of a hybrid. It has many desirable characteristics such as dependability of taste, quick maturity, disease and cold resistance.

What is it called?

At my house, we simple refer to it as monster tomato.