Add olive oil to cast-iron dutch oven or soup pot.
Add beef to the hot oil, giving a few minutes on each side to develop flavor.
Remove beef, add diced onion, and toss in oil and beef fat. Cook for about 3 or 4 minutes until the onions start to soften.
Add butter to the onions. Once melted, stir in einkorn flour and cook for 2 minutes.
Pour in beef broth and add carrots, celery, potatoes, herbs de provence, bay leaves, and salt.
Add partially cooked beef back to the pot. Reduce heat to low. Cover and simmer for 45 minutes, or until beef and vegetables are tender.
Add frozen peas and cook for an additional few minutes. You want them cooked, but still bright green.
Taste and add additional salt and pepper, if necessary.
Notes
If you are making a gluten-free version, mix together equal parts cornstarch and water to create a slurry and add towards the end of the cooking time. Pour a little slurry in, stir, and let it come to a simmer. Continue to add more slurry until desired thickness is achieved. Allow to cook a few minutes before serving.