1. Heat olive oil in a large pot or Dutch oven over medium-high heat until shimmering. Season beef generously with salt and pepper.
2. Brown beef in batches — don’t crowd the pot — until deeply caramelized on all sides, about 8-10 minutes per batch. Remove and set aside.
3. Add a little more oil to the same pot if needed. Sauté onion, garlic, sliced fennel, and carrots until slightly softened and fragrant, about 5-6 minutes, scraping up any browned bits from the beef.
4. Pour in beef broth and diced tomatoes with their juices. Stir in dried thyme, rosemary, salt, and pepper.
5. Return browned beef to the pot. Bring to a boil, then reduce heat to low. Cover and simmer for 2 hours until beef is completely tender and fennel has mellowed into the broth.
6. Taste and adjust seasoning before serving hot — garnished with reserved fennel fronds if you have them.

Nutrition Information (Per Serving):

• Calories: 355
• Carbohydrates: 18g
• Protein: 32g
• Fat: 16g
• Fiber: 5g
• Sodium: 760mg
• Key vitamins/minerals: Vitamin C (25% DV from fennel), Vitamin A (50% DV from carrots), Iron (22% DV), Potassium (20% DV)
• Note: Fennel contributes meaningful vitamin C and potassium alongside its unique aromatic compounds, making this a more nutritionally complex stew than it might appear.

Notes:

• Brown beef in batches no matter how tempting it is to add it all at once — this single step determines the flavor of the finished broth
• Don’t judge the fennel flavor until after the full two-hour simmer — the transformation is remarkable and completely changes the character of the ingredient
• Save the fennel fronds and use them like fresh herbs scattered over the finished bowls

Storage Tips:

• Refrigerate in an airtight container for up to 4 days — flavor deepens significantly overnight
• Freeze in portions for up to 3 months — fennel softens further after freezing but flavor holds beautifully
• Reheat on the stovetop over medium-low heat with a splash of broth to restore consistency

Serving Suggestions:

• Serve over creamy polenta for a classic Italian-inspired pairing that soaks up the rich broth perfectly
• Pair with crusty bread for scooping directly from deep bowls
• Serve alongside a simple arugula salad with lemon dressing to cut through the richness
• Ladle over egg noodles for a heartier, more filling bowl

Mix It Up (Recipe Variations):

• Tomato Paste Version: Stir a tablespoon of tomato paste in with the vegetables before adding broth for deeper color and a more intense, concentrated sauce
• Mediterranean Olive Twist: Add a handful of green olives in the last 30 minutes of simmering for a briny depth that pairs beautifully with the fennel
• White Bean Addition: Stir in a cup of drained white beans during the last 20 minutes for extra heartiness and a naturally creamy texture throughout the broth

What Makes This Recipe Special: Fennel’s transformation during a two-hour braise is what makes this stew genuinely special — the assertive anise quality that makes raw fennel divisive mellows into something subtly sweet and silky that blends seamlessly into the beef broth and gives it a complexity that root vegetables alone simply can’t provide. Browning the beef thoroughly before building the stew ensures the broth has real depth from the very first ladle, which is what separates a memorable beef and fennel stew from a pot of boiled meat and vegetables.