Slow Cooker Korean Beef

• 2 lbflank steak — excess fat trimmed, cut into 3–4 inch chunks
• 1large yellow onion — thinly sliced
• 1 tbspcornstarch — or arrowroot powder
• 1 tbspwater
• —sesame seeds
• —green onion — optional
• —cauliflower rice — or steamed rice

Sauce

• ½ cupbeef broth
• ½ cupcoconut aminos — or soy sauce or tamari
• 1ripe pear — cored, diced
• 2 tbsprice vinegar
• 1 tbspsesame oil
• 3garlic — smashed
• 1½fresh ginger — peeled, minced or grated
• 1½ tspkosher salt
• ½ tsppepper — ground