For the quail, whisk the peanut oil, Beaujolais, jelly, soy sauce, shallots, tarragon, salt and pepper in a stainless steel saucepan. Heat just until warm. Pour over the quail in a shallow dish, turning to coat. Marinate at room temperature for 30 minutes or in the refrigerator for up to 10 hours, turning occasionally; drain. Saute the quail breast side down in a mixture of the butter and peanut oil in skillet; turn. Cook for 6 minutes longer or until cooked through. Remove the heated plate. Cover to keep warm. Discard pan drippings from the skillet and reserve the skillet to use in the preparation of the sauce.
For the sauce, pour 1/2 cup of the Beaujolais into a microwave-safe bowl. Microwave just until warm. Stir in the cherries. Let stand until plump. Deglaze the reserved skillet with the remaining 1 cup beaujolais. Stir in the shallots. Cook until reduced by half, stirring constantly. Stir in the cherries, stock, jelly and tarragon. Cook until reduced by half, stirring constantly. Whisk in the butter. cook until slightly thickened, stirring constantly. Season with salt and pepper.
For the spinach, saute the spinach in the butter in a skillet until wilted. Season with salt and pepper.
To assemble, divide the spinach evenly among 4 serving plates. Top each serving with 2 quail. Drizzle with the sauce.