A new frequent favourite of mine is grilled or baked stuffed portobello mushroom, and I started looking for a rapid but simple filling.
In most grocery stores you can find packaged sausage meat, I usually grab a one of sweet italian and one of spicy italian. I mix them together in a bowl, I then add a tablespoon or so of caraway seeds; a tablespoon or two of fennel seeds; if I have it on hand some roast garlic, or some caramelized onions; occasionally I've added sun-dried tomatoes. Totally depends on what I have on had or what flavours I'm craving.
Take a gilled and stemmed portobello mushroom, but try to leave the sides intact when you remove the gills, otherwise the cheese tends to escape. Add a teaspoon or so of goat cheese, and cover with the sausage mixture. I like mine meaty so I'm more generous on the sausage, but when you cook your food do it your way.
I've baked them in a 425 oven, I've broiled them, barbecued them, I've even pan fried them. It has totally depended on what else I have been doing. As long as the sausage meat is cooked things are good.
Serve with some vegetables, or a salad, and a starch of your choice .... or use them for a "hamburger" the concept is what was important....