Fresh thyme for garnish
Heat oven to 400 degrees
Place prosciutto on baking pan and crisp turning at 5 minutes. Bake for 10-15 minutes, enough to get a good crumble. Set aside.
Heat bread in oven for 5 minutes.
Slice in 1/2 slices on diagonal.
Melt butter in small frying pan.
Slice shallots and put in pan on low heat, until caramelized. They should be very soft, browned.
Add in blackberry preserves.
Spread very light serving of cheese on toast. Spread preserves mixture.
Top with crumbled prosciutto and garnish with a little fresh thyme.