Canola cooking spray as needed
2 medium sweet onions - (8 oz total) minced
5 scallions, white part only minced
2 celery ribs minced
1 medium carrot - (3 oz) shredded
1 small red bell pepper - (4 oz) seeded, minced
1 garlic clove minced
1 tablespoon minced fresh thyme leaves
= (or 1 tspn crushed dried thyme)
1/2 teaspoon salt (optional)
1/2 teaspoon freshly-ground black pepper or to taste
1/4 teaspoon cayenne pepper
1 dash ground nutmeg
1 1/2 pounds very lean veal coarsely ground
1 egg lightly beaten
1 teaspoon Dijon mustard
1/2 cup soft bread crumbs
3 large tomatoes - (10 oz ea) sliced
2 bunches fresh arugula - (abt 6 oz) washed