The addition of shaved Brussels sprouts and colorful radicchio adds texture and a big hit of nutrients to a classic Caesar. The recipe also works in creamy avocado, which acts as a pleasing counterpoint to the salads bitter edge. Make it a main dish by adding a soft cook egg on the side or tossing slices of cooked chicken or chick peas into the mix.
Preheat oven to 400 degrees F.
Pile the croutons onto a sheet pan, drizzle a few teaspoons olive oil over them and add a couple pinches salt. Toss everything together with your hands. Bake until the croutons begin to turn golden brown, about 6 minutes. Remove from oven and set aside.
Stack the anchovies on a cutting board and use a fork to mash them into a paste. Transfer to a small bowl along with the mustard, garlic, lemon juice, vinegar, water, salt, and several grounds of fresh black pepper. Whisk to blend. Add the Parmesan and whisk again. Gradually add the 1/3 cup plus 1 tablespoon olive oil to the bowl, whisking all the while to blend. Set aside.
Toss the romaine, radicchio, Brussels sprouts, and croutons in a large bowl. Drizzle on most of the dressing and toss several times to coat everything well. Add the avocado and a little more dressing, if needed, and toss again. Add more salt or black pepper, if desired. Generously shower the salad with finely grated Parmesan cheese. Serve immediately.
If you're sensitive to garlic, leave the clove whole and immerse it in the dressing. It will infuse the dressing with flavor without some of the common side effects of garlic.