Breads with roast

1 tablespoon light butter , stick kind 1 large onion , chopped 2 leeks , cleaned, chopped 2 carrots , chopped 1 (8 ounce) package white mushrooms , sliced 1/4[...]

4 1/2 teaspoons dried yeast 450 ml warm water 1 tablespoon sugar 120 ml extra virgin olive oil , plus additional extra virgin olive oil , for brushing 2[...]

2 loaves egg bread (NOT the very sweet kind) or 2 loaves challah 1 lb ground veal or 1 lb lean ground beef 1 lb ground pork 2 tablespoons Worcestershire sauce[...]