Cook pasta according to package directions.

While pasta is cooking, place salad dressing and tofu in a pan.

Mash the tofu with a fork until it is in pieces about 1/3 inch in size.

Add sun-dried tomatoes, red onion, salt, pepper, and garlic to the pan.

Stir the mixture well to combine.

Heat the mixture over medium heat until hot.

Add shredded spinach to the pan.

Stir until spinach is slightly wilted but still mostly raw.

Serve the tofu and spinach topping warm over the cooked pasta.