In a skillet, heat the oil over low heat and sweat the vegetables. Set aside to cool.
In a large bowl, mix together the beef, veal and sausage meat.
Add the vegetables, seasonings, egg, breadcrumbs and Tabasco sauce. Stir well.
Shape 2 medium loaves or 6 smaller ones.
Wrap the loaves with aluminum foil, shiny side facing in.
Place on a baking sheet and cook in the oven for 40 minutes.
Remove from the oven and let rest for 5 minutes.
Slice and top with tomato sauce before serving.
Tip:
Meat loaves are easily frozen. And you may use some leftover meat loaf in a sandwich with mustard, cheese and lettuce, in a toasted panini or even sliced and reheated in the oven with tomato sauce - it's quick and tasty.