Heat grill pan over medium heat.
Brush bread slices with olive oil and grill lightly. Remove and rub each pieces with garlic.
Mix 1 cup of day hold with 2 cups of canned tomato in to a sauce pan, add 1 Tbsp of olive oil and salt and pepper to taste. Cook over low heat until bread completely and has a porridge consistency. Set aside to cool
Start with your favorite store bought pesto. Add 1/2 cup of Kale and 1 Tbsp of cashews to a food processor and process until fine. Add mixture to pesto and mix well. Add more pesto if too thick.
Using 1 half of loaf, spoon 1 Tbsp of panne tomato on to bottom piece of bread. Next, add ricotta, basil, prosciutto and top with arugula. Spread pesto on remaining piece of bread and top to complete sandwich. Serve.