3 sauteed chicken potatoes pears Recipes

olive oil, skinless, boneless chicken-breast halves, 2 pork tenderloins, halved (1 1/2 to 2 lb total), or 1 1/2 lb skinless salmon fillet (4 pieces), kosher salt, freshly ground black pepper, sweet potato, peeled and cubed (1 1/2 cups), firm pear -- peeled, cored, and cubed, red wine vinegar, dijon mustard, fresh tarragon leaves, chopped

olive oil, yellow onion, medium, chopped, garlic cloves, crushed (or sliced ), boneless skinless chicken breasts (or 1-1/2 to 2-lbs. pork tenderloins or skinless salmon fillets), kosher salt (optional), sweet potatoes, peeled and cubed, pears, ripe but firm-not soft-peeled, cored, and cubed, red wine vinegar, dijon mustard, tarragon leaves, fresh, finely chopped, fresh ground black pepper