Over low-medium hot dutch oven, brown the sausage. If it does not produce it's own fat, add the olive oil.
Once browned, add the onion. Stir a couple times, then also add the chopped mushrooms. In 2-3 minutes, add the diced pepper & garlic, & anchovies and stir in. The anchovies will melt into the fat.
Once the pepper and onions have started to soften, add all the water and concentrate or bouillon cubes (or feel free to use beef stock for half of the water if you have it).
Stir in the dried herbs, salt and pepper. Let simmer on low for 20 minutes or so to meld the flavors together.
Add the pasta and simmer until the pasta is cooked. It will absorb some of the water, so feel free to add more stock or water if it gets too thick for you.