Preheat the oven to 400 degrees. Generously grease an 8-by 4-inch loaf pan.
Put the thawed spinach in a sieve and drain, pressing several times. (But don't go nuts; leave it moist or it will be so dry it can't be mixed well with the other ingredients.)
In a mixing bowl combine eggs, cheese, bread crumbs, vinegar, salt, pepper and hot pepper sauce. Stir in the spinach, combining well (use hands if necessary to distribute the cheese mixture throughout the spinach). Pat into the prepared pan and bake about 45 minutes, until a knife inserted in the center comes out clean.
Meanwhile, fry the bacon in a medium frying pan until it is crisp. Drain the bacon on paper towels and pour off all but 1 tablespoon of fat from the pan. Cook the onion and green pepper in the bacon fat over medium heat for 5 minutes, until the onions begin to color and the pepper pieces are tender.
Stir in the flour and cook 1 minute. Gradually stir in the water, cooking and stirring until the mixture his thickened. Stir in the tomatoes, crumble the bacon and add it, too. Season with pepper to taste and cook and stir for several minutes to heat through.
Run a knife around the loaf and invert it onto a platter. Slice, drizzle with sauce and pass remaining sauce.