chop nuts & veggies
in the food processor just
short of a puree

source, 4 servings
1 lb tagliatelle, cooked; 1 lb mushrooms, 1 c toasted walnuts, 2 c mirepoix, olive oil, salt & pepper, 1/2 c white wine, tiny can tomato paste, 2 c broth, 1/2 c half & half, parm
process mushrooms, walnuts, mirepoix in food processor separately; cook mushrooms in oil in single layer until browning, toss with salt, remove; cook mirepoix in oil and salt until almost dry; add mushrooms, walnuts, pepper, cook 2 minutes; add wine, cook 2 minutes; add tomato paste, cook 2 minutes; add stock, simmer until thick; add half & half; serve over pasta, top with parm