On large shallow plate combine 1/4 cup flour, salt and pepper. Dredge roast through flour mixture. Add canola oil to large skillet. Brown bottom round roast on all sides.

Place onions on bottom of slow cooker. Add browned roast, fire roasted tomatoes, beef broth, crushed garlic, dried oregano, dried basil, carrots and red potatoes. Cook on Low setting; allow 6-8 hours. High setting; allow 4-6 hours Transfer roast, potatoes and carrots to a cutting board.

Mix 1/4 cup flour with 1 cup of the the broth from the slow cooker; whisk until they are completely combined. Slowly whisk into the slow cooker. Cover and cook for five minutes.

Slice the beef against the grain if it has not fallen apart. Return beef, potatoes and carrots to slow cooker on low for 20-30 minutes to meld all the flavors together.