Melt together 2 Tbsp. oil and 2 Tbsp. butter in a large stockpot.

Add mushrooms, saute’ 4 to 5 minutes. Remove mushrooms from pot and set aside.

Add the remaining oil and butter to the pot and melt together. Whisk in Clearjel, then tomato paste until smooth. Add broth gradually, whisking well. Continue whisking over medium heat until mixture is smooth and bubbly. Add sherry and pepper. Stir in reserved mushrooms, heat through.

Ladle mixture into hot jars, debubble, leaving 1″ headspace, cap. Pressure Can at 10 lbs. for 45 minutes (adjusted for your altitude).