Place flour, salt and pepper in a large zip-lock bag. Add the chunks of beef, seal the bag, and shake to coat the meat with the flour mixture. Or Put in a bowl and coat meat
Heat 1 ½ tablespoons of the olive oil in a large skillet ,Add the cubes of beef in a single layer in the pan (brown the beef in two batches if necessary). Let the beef brown on the first side for 3- 4 minutes, then flip and brown the other side. Stir in any remaining flour from the bag and then transfer the beef to the slow cooker.
Add the remaining olive oil and the onion to the pan. Cook the onion, stirring occasionally, until softened, 3-4 minutes.
Add the minced garlic and cook, stirring, for 30 seconds.
Pour a little bit of beef broth into skillet and scrape any brown bits left in skillet
Transfer meat , and any contents from skillet to slow cooker
Add the remaining ingredients including beef broth and tomato paste and other vegetables and spices to the slow cooker
Cook on low for 6-8 hours or on high for 4 hours