Clean and cut up the vegetables, keeping them in separate bowls because they go into the pan one after another.
In a large pan, heat oil and brown the meats well in the center, then push them to the edges.
Sauté the spring garlic and the tomato, then add the other vegetables - the green beans, peas and artichokes - stirring constantly so they do not burn.
When the vegetables are browned, pour in 3 parts water to 1 part rice, and note the water level in the pan.
Simmer over medium-low heat for 30-45 minutes until the vegetables are tender.
Top up the water to the previous level, add the rice and the saffron, spread evenly, and season.