This dish is full of big flavors, combining bittersweet red onions with the herbal, bitter and pungent notes of fennel seed, rosemary, garlic, olive and crushed red pepper flakes.
Blanching the broccoli rabe for just a minute, then shocking it in ice water before sauteing it with garlic in olive oil, mellows the vegetable's mustardlike bitterness into a mouthwatering taste dimension.
Here, the flavored cheese sauce coats but does not cool to a firm, congealed state, which makes it perfect for those who appreciate good nacho coverage and for those occasions where guests can build their individual portions.