july 5 - july 18 produce quick tips portobello mushrooms fresh and dried portobello mushrooms may be found year-round in the produce department and are also available canned for convenient pantry storage darkly colored portobello's tend to be more flavorful whereas lighter brown portobello's are milder in flavor bags allow the mushrooms to "breathe" and discourage the accumulation of moisture which can cause the directly in the refrigerator remove large portobello's from any packaging and use a paper towel to gently lift soil or growing medium and all portobello's before placing them in an airtight container in your freezer compartment cabbage and are a nutritious alternative for vegans and those seeking alternative sources of protein that is more commonly derived from meat to meat and are well-suited for bbq grilling and wholesome veggie burgers many chef's add portobello mushrooms in their burgers and recipes that call for burgers to increase the portobello mushrooms are the most popular mushrooms sold in the united states and account for 90 percent of all mushrooms sales